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Adventures in puzzle-land: Sharpen your wits with Alex Bellos, the Guardian's puzzle expert | Guardian Masterclasses | The Guardian
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Perilous Problems for Puzzle Lovers: Math, Logic & Word Puzzles to Challenge Your Brain (Alex Bellos Puzzle Books): Bellos, Alex: 9781615197187: Amazon.com: Books
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Six of the best puzzles, chosen by Alex Bellos, mathematician and author | Saturday Review | The Times
![Alex Bellos on Twitter: "A new puzzle launches in today's print edition of the Guardian. Sandwich Sudoku is a very entertaining sudoku variant. A new craze! https://t.co/VIeOlcBfzu https://t.co/1yaZ38L4UC" / Twitter Alex Bellos on Twitter: "A new puzzle launches in today's print edition of the Guardian. Sandwich Sudoku is a very entertaining sudoku variant. A new craze! https://t.co/VIeOlcBfzu https://t.co/1yaZ38L4UC" / Twitter](https://pbs.twimg.com/media/D9FTTPnX4AA8Pih.jpg:large)